“He said ‘Oh well, you are doing the national anthem,'” Sebastien told us. “And my dad called me, and I was like ‘Yes!'”

And he planned to use his talent to wish the Spurs luck.

“It was amazing,” said Sebastien. “And if you look back at the video, and I went like that (gesturing). That was just, and I don’t know, it was just something I felt. Part of it was just giving the Spurs luck.”

Although the Spurs did win, people posting racially-charged tweets about Sebastien tried to ruin the night. One guy tweeted: “9 out of 10 chance that kid singing the national anthem is illegal.” Another wrote “this kid is mexican why is he singing the national anthem.”

And the comments got worse. The talented young singer didn’t pay any attention to the social media storm.

“I knew that one day when I sing, people were going to judge me,” said Sebastien. “And that’s why, over the time that I have grown, you don’t really care about what people say about you. It’s about what you think about yourself.”

So, just as the Spurs wipe out the Heat with class, Sebastien has a final gesture for those writing all of those mean tweets.

“I don’t really care about what y’all say, and I am doing this right now,” said Sebastien as he wiped his shoulder with his hands. “It is off my shoulders.”

Sebastien and his family say their main goal is to focus and honor the tens of thousands of fans who do support him.

Next week, Sebastien will be in Brooklyn, New York. The 11-year-old was invited to partake in a National Convention for Mariachis and Singers. Sebastien is hopeful that singing at the NBA Finals will one day help two more of his dreams come true — singing at the Super Bowl and the World Series.